@media screen and (max-width: 48rem) {
  body {
    min-width: 18.75rem;
    min-height: 31vh;
  }
  .moNavBtnHide {
    display: none;
  }
  header {
    width: 100%;
    box-sizing: border-box;
  }
  header nav {
    box-sizing: border-box;
    width: 100%;
  }
  header .nav_box {
    width: 100%;
    box-sizing: border-box;
  }
  main {
    width: 100%;
    display: block;
    min-height: 22vh;
    box-sizing: border-box;
  }
  footer {
    width: 100%;
    box-sizing: border-box;
  }
  .activity_box {
    width: 100%;
  }
  .activity_details {
    width: 100%;
  }
  .activity_content {
    margin: 0 auto;
    margin-top: 1.25rem;
    width: 100%;
    height: auto;
    background: #FFFFFF;
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-bottom: 2.5rem;
  }
  .activity_content h2 {
    width: 100%;
    height: 1.6875rem;
    font-family: SourceHanSansCN;
    font-weight: bold;
    font-size: 1.25rem;
    color: #333333;
    line-height: 1.8125rem;
    margin-top: 2.125rem;
    text-align: center;
  }
  .activity_content h6 {
    width: 100%;
    height: 0.9375rem;
    font-family: SourceHanSansCN;
    font-weight: 400;
    font-size: 0.75rem;
    color: #999999;
    line-height: 1.8125rem;
    text-align: center;
    margin-top: 0.5625rem;
  }
  .activity_content hr {
    width: 100%;
    height: 0.0625rem;
    opacity: 0.22;
    margin-top: 1.875rem;
  }
  .activity_content .activity_con_img {
    width: 60%;
    height: 7.5rem;
    background: #02A0E7;
    margin-top: 1rem;
    object-fit: 100%;
  }
  .activity_content p {
    width: 80%;
    height: auto;
    text-indent: 2em;
    font-family: SourceHanSansSC;
    font-weight: 300;
    font-size: 0.75rem;
    color: #666666;
    line-height: 1.75rem;
    text-align: left;
    margin-top: 1.5625rem;
  }
  .activity_content .activity_button {
    width: 90%;
    height: 1.25rem;
    background: #FAFAFA;
    margin-top: 2.0625rem;
    display: flex;
    justify-content: space-around;
    padding-bottom: 1.25rem;
  }
  .activity_content .activity_button button {
    width: 40%;
    height: 2.5rem;
    font-family: SourceHanSansSC;
    font-weight: 300;
    background: #FAFAFA;
    font-size: 0.75rem;
    color: #666666;
    line-height: 2.5rem;
    border: 0rem;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}
@media screen and (min-width: 48.0625rem) {
  body {
    min-width: 75.0625rem;
  }
  main {
    width: 100%;
    height: 100%;
    min-height: 21vh;
  }
  .activity_box {
    width: 100%;
    margin: 0 auto;
  }
  .activity_details {
    width: 100%;
    padding-bottom: 5rem;
  }
  .activity_content {
    margin: 0 auto;
    padding-bottom: 2.5rem;
    width: 80%;
    height: auto;
    background: #FFFFFF;
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }
  .activity_content h2 {
    width: auto;
    height: 1.6875rem;
    font-family: SourceHanSansCN;
    font-weight: bold;
    font-size: 1.75rem;
    color: #333333;
    line-height: 1.8125rem;
    margin-top: 4.25rem;
  }
  .activity_content h6 {
    width: auto;
    height: 0.9375rem;
    font-family: SourceHanSansCN;
    font-weight: 400;
    font-size: 0.875rem;
    color: #999999;
    line-height: 1.8125rem;
    margin-top: 1.1875rem;
  }
  .activity_content hr {
    width: 80%;
    height: 0.0625rem;
    opacity: 0.22;
    margin-top: 4.375rem;
  }
  .activity_content .activity_con_img {
    width: 40.25rem;
    height: 23.25rem;
    background: #02A0E7;
    margin-top: 1.9375rem;
  }
  .activity_content p {
    width: 70%;
    height: auto;
    text-indent: 2em;
    font-family: SourceHanSansSC;
    font-weight: 300;
    font-size: 0.875rem;
    color: #666666;
    line-height: 2.25rem;
    margin-top: 3.3125rem;
  }
  .activity_content .activity_button {
    width: 90%;
    height: 5rem;
    background: #FAFAFA;
    margin-top: 4.1875rem;
    display: flex;
    justify-content: space-around;
  }
  .activity_content .activity_button button {
    width: 40%;
    height: 5rem;
    font-family: SourceHanSansSC;
    font-weight: 300;
    background: #FAFAFA;
    font-size: 0.9375rem;
    color: #666666;
    line-height: 5rem;
    border: 0rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}